<template>
  <div>
    <Breadcrumb></Breadcrumb>
    <el-card>
      <el-alert title="消息提示的文案" type="info" show-icon :closable="false" center></el-alert>
      <!-- 步骤条 -->
      <el-steps :space="200" :active="nowTab - 0" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!-- tabs标签页 -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
        label-position="top"
      >
        <el-tabs
          v-model="nowTab"
          :tab-position="'left'"
          :before-leave="beforeTabLeave"
          @tab-click="tabClicked()"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <!-- 选择商品分类的级联选择框 -->
              <el-cascader
                expandTrigger="hover"
                v-model="addForm.goods_cat"
                :options="cateList"
                :props="setobj"
                @change="handleChange"
                clearable
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <!-- 渲染表单item项 -->
            <el-form-item :label="item.attr_name" :key="item.attr_id" v-for="item in manyTableData">
              <!-- 使用数组渲染复选框组 -->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox border :label="val" v-for="(val,i) in item.attr_vals" :key="i"></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <!-- 循环生成静态属性 -->
            <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <el-upload
              :action="uploadURL"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              :on-success="handleSuccess"
              list-type="picture"
              :headers="headerObj"
            >
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!-- 富文本编辑器组件 -->
            <!-- 富文本编辑器组件 -->
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <!-- 添加商品按钮 -->
            <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <!-- 预览图片对话框 -->
    <el-dialog title="图片预览" :visible.sync="previewVisible" width="50%">
      <img :src="previewPath" class="previewImg" />
    </el-dialog>
  </div>
</template>

<script>
import { getCateList, getTabClicked, getMany } from "@/api/Goods/getAdd.js";
import Breadcrumb from "@/components/Breadcrumb";
import _ from "lodash";
export default {
  //import引入的组件需要注入到对象中才能使用
  components: { Breadcrumb },
  props: {},
  data() {
    //这里存放数据
    return {
      nowTab: "0",
      cateList: [], //所有商品数据
      setobj: {
        label: "cat_name",
        value: "cat_id",
        children: "children"
      },
      //添加商品的表单数据对象
      addForm: {
        goods_name: "",
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        goods_cat: []
      },
      //验证规则
      addFormRules: {
        goods_name: [
          { required: true, message: "请输入商品名称", trigger: "blur" }
        ],
        goods_price: [
          { required: true, message: "请输入商品价格", trigger: "blur" }
        ],
        goods_weight: [
          { required: true, message: "请输入商品重量", trigger: "blur" }
        ],
        goods_number: [
          { required: true, message: "请输入商品数量", trigger: "blur" }
        ],
        goods_cat: [
          { required: true, message: "请选择商品分类", trigger: "blur" }
        ]
      },
      //动态参数列表
      manyTableData: [],
      //静态属性列表
      onlyTableData: [],
      //上传图片的url地址
      uploadURL: "http://127.0.0.1:8888/api/private/v1/upload",
      //图片上传组件的headers请求头对象
      headerObj: { Authorization: window.sessionStorage.getItem("token") },
      //保存预览图片的url地址
      previewPath: "",
      //控制预览图片对话框的显示和隐藏
      previewVisible: false
    };
  },
  //计算属性 类似于data概念
  computed: {},
  //监控data中的数据变化
  watch: {},
  //方法集合
  methods: {
    handleChange() {
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = [];
        return;
      }
    },
    //获取当前所有分类数据
    async getCateList() {
      const { data: res } = await getCateList() 
      console.log(res);
      if (res.meta.status !== 200) {
        return this.$message.error("获取商品分类数据失败");
      }
      this.$message.success("获取商品分类成功");
      this.cateList = res.data;
    },
    //再到methods编写事件函数beforeTabLeave
    beforeTabLeave(activeName, oldActiveName) {
      console.log(activeName, oldActiveName);
      if (oldActiveName === "0") {
        if (this.addForm.goods_name.trim() === "") {
          this.$message.error("请选择商品名称");
          return false;
        } else if (this.addForm.goods_price <= "0") {
          this.$message.error("请选择商品价格");
          return false;
        } else if (this.addForm.goods_weight <= 0) {
          this.$message.error("请选择商品重量");
          return false;
        } else if (this.addForm.goods_number <= 0) {
          this.$message.error("请选择商品数量");
          return false;
        } else if (this.addForm.goods_cat.length !== 3) {
          this.$message.error("请选择商品分类");
        }
      }
    },
    async tabClicked() {
      //当用户点击切换tab栏时触发
      if (this.nowTab === "1") {
        //发送请求获取动态参数
        const { data: res } = await getTabClicked(this.cateId, { sel: "many" })
        console.log(res);
        if (res.meta.status !== 200) {
          return this.$message.error("获取动态参数列表失败");
        }
        //将attr_vals字符串转换为数组
        res.data.forEach(item => {
          item.attr_vals =
            item.attr_vals.length === 0 ? [] : item.attr_vals.split(" ");
        });
        this.manyTableData = res.data;
      } else if (this.nowTab === "2") {
        //发送请求获取静态属性
        const { data: res } = await getMany(this.cateId, { sel: "only" })
        console.log(res.data);
        if (res.meta.status !== 200) {
          return this.$message.error("获取静态属性列表失败");
        }

        this.onlyTableData = res.data;
        console.log(res.data);
      }
    },

    handlePreview(file) {
      //当用户点击图片进行预览时执行，处理图片预览
      //形参file就是用户预览的那个文件
      this.previewPath = file.response.data.url;
      //显示预览图片对话框
      this.previewVisible = true;
    },
    handleRemove(file) {
      //当用户点击X号删除时执行
      //形参file就是用户点击删除的文件
      //获取用户点击删除的那个图片的临时路径
      const filePath = file.response.data.tmp_path;
      //使用findIndex来查找符合条件的索引
      const index = this.addForm.pics.findIndex(item => item.pic === filePath);
      //移除索引对应的图片
      this.addForm.pics.splice(index, 1);
    },
    handleSuccess(response) {
      //当上传成功时触发执行
      //形参response就是上传成功之后服务器返回的结果
      //将服务器返回的临时路径保存到addForm表单的pics数组中
      this.addForm.pics.push({ pic: response.data.tmp_path });
    },

    //添加商品
    add() {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return this.$message.error("请填写必要的表单项!");

        //将addForm进行深拷贝，避免goods_cat数组转换字符串之后导致级联选择器报错
        const form = _.cloneDeep(this.addForm);
        //将goods_cat从数组转换为"1,2,3"字符串形式
        form.goods_cat = form.goods_cat.join(",");
        //处理attrs数组，数组中需要包含商品的动态参数和静态属性
        //将manyTableData（动态参数）处理添加到attrs
        this.manyTableData.forEach(item => {
          form.attrs.push({
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join("")
          });
        });
        //将onlyTableData（静态属性）处理添加到attrs
        this.onlyTableData.forEach(item => {
          form.attrs.push({
            attr_id: item.attr_id,
            attr_value: item.attr_vals
          });
        });

        //发送请求完成商品的添加,商品名称必须是唯一的
        const { data: res } = await this.$http.post("goods", form);
        console.log(res);
        if (res.meta.status !== 201) {
          return this.$message.error("添加商品失败");
        }
        this.$message.success("添加商品成功");
        //编程式导航跳转到商品列表
        this.$router.push("/goods");
      });
    }
  },
  //生命周期 - 创建完成（可以访问当前this实例）
  created() {
    //获取当前所有分类数据
    this.getCateList();
  },
  //添加 计算属性获取三级分类
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2];
      }
      return null;
    }
  },
  //生命周期 - 挂载完成（可以访问DOM元素）
  mounted() {},
  beforeCreate() {}, //生命周期 - 创建之前
  beforeMount() {}, //生命周期 - 挂载之前
  beforeUpdate() {}, //生命周期 - 更新之前
  updated() {}, //生命周期 - 更新之后
  beforeDestroy() {}, //生命周期 - 销毁之前
  destroyed() {}, //生命周期 - 销毁完成
  activated() {} //如果页面有keep-alive缓存功能，这个函数会触发
};
</script>
<style lang='scss' scoped>
.el-card {
  margin-top: 20px;
  background: rgba(0, 0, 0, 0.5);
}
.el-steps {
  margin-top: 20px;
  margin-bottom: 20px;
}
.el-tab-pane {
  color: white;
}
.ql-editor {
  min-height: 300px;
}
//给添加商品按钮添加间距
.btnAdd {
  margin-top: 15px;
}
// /deep/.el-input__inner {
//   margin-left: -66px !important;
//   margin-top: 50px;
// }
// /deep/.el-input__icon {
//   margin: 25px 60px !important;
// }
// /deep/.el-cascader__dropdown {
//   margin-top: 58px !important;
// }
</style>